EP 2612946 B1 20150408 - HIGH-STRENGTH STEEL SHEET HAVING EXCELLENT FRACTURE RESISTANCE PERFORMANCE AND HIC RESISTANCE PERFORMANCE
Title (en)
HIGH-STRENGTH STEEL SHEET HAVING EXCELLENT FRACTURE RESISTANCE PERFORMANCE AND HIC RESISTANCE PERFORMANCE
Title (de)
HOCHFESTES STAHLBLECH MIT HERVORRAGENDER BRUCHFESTIGKEIT UND HERVORRAGENDEM HIC-WIDERSTAND
Title (fr)
TÔLE D'ACIER À HAUTE RÉSISTANCE PRÉSENTANT D'EXCELLENTS RÉSULTATS DE RÉSISTANCE À LA RUPTURE ET DE RÉSISTANCE À LA FISSURATION INDUITE PAR HYDROGÈNE
Publication
Application
Priority
- JP 2010197417 A 20100903
- JP 2011070027 W 20110902
Abstract (en)
[origin: EP2612946A1] A high-strength steel sheet having improved HIC resistance and fracture resistance even when it is thick has a chemical composition comprising, in mass %, C: 0.02 - 0.07%, Si: 0.05 - 0.50%, Mn: 1.10 - 1.60%, P: at most 0.015%, S: at most 0.0030%, Nb: 0.005 - 0.030%, Ti: 0.005 - 0.020%, Al: 0.005 - 0.060%, Ca: 0.0005 - 0.0060%, N: 0.0015 - 0.0070%, at least one of Cu, Ni, Cr, and Mo in a total of greater than 0.1 % to less than 1.5%, and a remainder of Fe and impurities and a steel structure composed of at least 10% by area of bainite and a remainder of ferrite and pearlite. The degree of segregation is less than 1.6 for Nb and less than 1.4 for Mn in the central portion of the thickness of the steel sheet.
IPC 8 full level
C22C 38/58 (2006.01); C21D 8/02 (2006.01)
CPC (source: EP KR US)
C21D 8/02 (2013.01 - KR); C21D 8/0205 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/42 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/46 (2013.01 - EP US); C22C 38/48 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); C22C 38/58 (2013.01 - EP KR US); F16L 9/02 (2013.01 - EP US); C21D 2211/002 (2013.01 - EP US); C21D 2211/005 (2013.01 - EP US); C21D 2211/009 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2612946 A1 20130710; EP 2612946 A4 20140326; EP 2612946 B1 20150408; CA 2810167 A1 20120308; CA 2810167 C 20170117; CN 103189538 A 20130703; CN 103189538 B 20150318; JP 5299579 B2 20130925; JP WO2012029945 A1 20131031; KR 20130064799 A 20130618; RU 2013114842 A 20141010; RU 2532791 C1 20141110; US 2014144551 A1 20140529; US 9528172 B2 20161227; WO 2012029945 A1 20120308
DOCDB simple family (application)
EP 11821959 A 20110902; CA 2810167 A 20110902; CN 201180053226 A 20110902; JP 2011070027 W 20110902; JP 2012531974 A 20110902; KR 20137008296 A 20110902; RU 2013114842 A 20110902; US 201113820581 A 20110902